WHY EARTHING NOT NEEDED IN BATTERY IN SUBSTATION?
Answers were Sorted based on User's Feedback
Basically a device is earthed to avoid any stray
circulating current that appear on the body of the device
operating with an AC supply.
since AC creates an alternating flux. this changes in flux
induces stray currents in the metallic body of the devices.
When coming to DC, since it is a constant voltage it does
not produce flux change to induce any currents so earthing
is not required for a DC battery.
Is This Answer Correct ? | 15 Yes | 3 No |
Answer / prasoon
In a HV Sub station, 220 Volt system is not earthed to
avoid mal operation of DC controlled electrical elemnets in
case of a earth fault.
50 Volt system is earthed (-ve). This is done as 50 volt
system is used for electronic circuits where -ve voltage is
required to opearate npn transistors.
Is This Answer Correct ? | 7 Yes | 6 No |
Answer / aamod tripathi
To avoid circulating current in DC system.
Is This Answer Correct ? | 7 Yes | 7 No |
b/c there is already availabe zero potential in batry
(ie -ve terminal).
Is This Answer Correct ? | 1 Yes | 2 No |
Answer / kanth
there is no need of earthing fo Dc systems
and in AC only earthing is needed
bcoz power generated from generators and ttransfer from
transformers ,so transrormers neutral's earthing has done
(in star-star or delta-star trafo)so phase currents goes
directly though earth or in neutral as a returned path to
transformer.
so we r using neutral for return path and earthing for
safety
Is This Answer Correct ? | 4 Yes | 16 No |
simple way to find busbar sizes??
I WOULD LIKE NOW WHY WE CANT USE SOME CT FOR MESARING AND PROTECTION
what will be the motor terminal box connection arrangement (star or delta). on what basis it decided?
Which type of arc protection devices used.
how electrical energy is converted into mechanical energy in dc motor
Why in India only 50hz frequency not 60hz
what is the principle of motor
Can anybody explain me the electrical circuit of indian railways to drive electrical engines(LOCOMOTIVES)? How does overhead lines work in the circuit to drive different trains on the same track?
what is the full form of XLPE adn there use.
What are the advantages and disadvantages of oil filled transformers?
2 Answers Mercantile Marine Department, Studio College,
why we have to do tan delta test of the transformer oil???
HT motors are generally connected in star, what will be the effect if we connect HT motor in Delta?
6 Answers Equate, Ion Exchange,